doctrine of, in Compromise of 1850, i. 91, 92, 94;

used by Douglas to justify repeal of Missouri Compromise, 94, 95;

theory of, destroyed by Dred Scott decision, 103;

attempt of Douglas to reconcile, with Dred Scott case, 107.

Porter, General Andrew,

favors McClellan's

plan of campaign, i. 336.

Porter, David D.,

takes Powhatan under Lincoln's orders, i. 247;

refuses to obey Seward's order, 248;